Find or Build libxpa

Changes for v2.1.20.7 - 2023-05-18T18:09:17-04:00

• promote to production; No changes from v2.1.20.6.
• MSWin32 always fails tests due to what seems to be a free in the wrong thread. No clue at the moment what is causing that and how to fix it.

A macro pre-processor with embedded perl capability

Changes for 2.14 - 2023-05-18

• Bug Fixes
• #73 Error at file - line 1: Eval error: Can't locate test1~ in @INC

Alien package for GEOS - Geometry Engine, Open Source

Changes for 1.012 - 2023-05-18

• Share builds: patch one file to build using gcc-13 on Windows.